Q: Can an AR-15 shoot full cans of soda or beer as ammo?
A: Yes. Yes, it can.
http://defenderoutdoors.com/160320-x...xac-cancan-blk
Can Cannon
Can launcher that uses a proprietary gas ported barrel and pressure tube to launch heavy, thin walled objects without burning a hole in them or directing hot gas directly into them. Set up for launching full, unopened 12-ounce soda cans. When used with standard mil-spec blanks, it reaches an average distance of 105 yards. Sold as an assembled upper with receiver headspaced and mounted ported barrel and pressure tank. Works with mil-standard bolt and most piston bolts. BATFE approved design; not considered a destructive device or firearm.